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Contract OI history

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Dec 18, 2026 EXPIRATION

WDC $400.00 Put

WDC261218P00400000

Latest saved OI1,165Oct 23, 2026
Last change+2vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
WDC $400.00 put open interest history 7 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 1,2166080 2026-10-09: 1,030 OI2026-10-12: 1,036 OI2026-10-14: 1,216 OI2026-10-15: 1,176 OI2026-10-16: 1,187 OI2026-10-21: 1,163 OI2026-10-23: 1,165 OI Oct 09, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

WDC contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing1,165+2
Oct 21, 20261,163-24
Oct 16, 20261,187+11
Oct 15, 20261,176-40
Oct 14, 20261,216+180
Oct 12, 20261,036+6
Oct 09, 20261,030No prior observation